Percolation study of orientated short-fiber composites by a continuum model
Percolation study of orientated short-fiber composites by a continuum model
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DOI：
10.1016/j.physa.2004.12.059
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发表时间：
2005-07-15
影响因子：
3.3
通讯作者：
Takahashi, T
中科院分区：
文献类型：
--
作者：
Natsuki, T;Endo, M;Takahashi, T
本文研究了二维交叉杆网络的逾渗问题，并对纤维增强复合材料的逾渗行为进行了研究。提出了一种修正的有限宽杆模型，用于预测纤维增强复合材料的体积分数逾渗阈值。基于所提出的模型和Monte Carlo模拟，研究了纤维长径比和取向对渗流行为的影响。在双对数图上发现，当长径比大于40时，渗流阈值与长径比呈线性关系。在小于30 °的取向角下，渗流阈值对取向角有较大的依赖性。根据考虑隧道效应的模型，预测了碳纳米管填充的复合体系具有较低的逾渗阈值。对于较低的纤维长径比，纤维末端强烈影响交叉开关网络的连接。(c)2005 Elsevier B.V.保留所有权利。
We present a percolation study of a two-dimensional crossbar networks and investigate the percolation behavior in fiber-reinforced composites. A modified model of sticks with a finite width is proposed for predicting percolation threshold of volume fraction of the fiber-reinforced composites. Based on the presented model and Monte Carlo simulations, the influences of fiber aspect ratio and orientation on the percolation behavior were investigated. It was found that the percolation threshold had a linear dependence with aspect ratio more than 40 in double-logarithmic plot. The percolation threshold had larger dependence on the orientation angle less than 30 degrees. In terms of a model considering the tunneling effect, furthermore, the composite system filled with carbon nanotubes predicted to obtain lower percolation threshold. For lower fiber aspect ratios, fiber ends strongly affected the connection of crossbar networks. (c) 2005 Elsevier B.V. All rights reserved.